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Rice cooker

A rice cooker and voltage technology, which is applied to cooking utensils, household utensils, applications, etc., can solve problems such as misjudgment by a pot detection device, and achieve the effect of expanding the allowable variation range

Active Publication Date: 2011-01-26
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general design, although a certain degree of voltage variation is also considered when setting the judgment level of the pot detection device, in areas where the mains power supply is unstable, if the voltage exceeds the expected range in a short period of time, then There will be a problem of misjudgment by the pot detection device

Method used

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Effect test

Embodiment 1

[0014] figure 1 It is a circuit block diagram showing the structure of the electric rice cooker in the first embodiment of the present invention. figure 1 Among them, the mains power supply 1 is converted into a DC voltage by a diode bridge rectifier circuit 3, and the heating coil 6, the resonant capacitor 7 and the high-power element 8 constitute an inverter circuit. This inverter circuit generates high-frequency power, and the high-frequency power is high The form of high-frequency magnetic field is supplied to the rice cooking pot 13 arranged above the heating coil 6, so that eddy current is generated in the rice cooking pot 13, and then the rice cooking pot 13 is heated by the Joule heat generated by the eddy current.

[0015] In addition, the current converter 2 a and the current-voltage conversion circuit 2 b constitute a current detection device 2 that generates a voltage proportional to the value of the alternating current flowing into the diode bridge rectifier cir...

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Abstract

The invention provides a rice cooker which can enlarge permitted changing range of the supply voltage, and can reliably determined whether the cooker is existed or not in an area with unstable supply voltage. The rice cooker comprises a converter circuit consisting of heating coils, a resonant capacitor and a large power element; a current detecting device which is used for detecting the AC current flowing into a diode bridge rectifier circuit and outputting the voltage which is directly proportional to the detected current; a converter voltage detecting device which is used for detecting the voltage in a converter circuit and outputting the voltage which is directly proportional to the detected voltage; a supply voltage detecting circuit which is used for detecting the mains supply voltage; and a cooker detecting device which is used for judging whether the cooker is installed on the regulated position when the output voltage of the converter voltage detecting device is higher than the output voltage of the current detecting device in a regulated threshold voltage. Under the condition that the detecting voltage of the supply voltage detecting circuit is higher than the standard voltage, the threshold voltage is set to be higher than the preset threshold voltage.

Description

technical field [0001] The present invention relates to an electric rice cooker, and more particularly, to an electric rice cooker for general household use or business use, which detects whether a pot in which rice and water are placed in advance is installed in the body of the electric rice cooker before the rice cooking operation starts. device in the pot holding chamber. Background technique [0002] Existing variable frequency rice cookers are generally provided with detection circuits for detecting the input current and the voltage of the frequency converter respectively, and compare the circuit outputs corresponding to the detection current and detection voltage of each detection circuit. If the output is greater than the output of the input current detection circuit, it is determined that the pot is not installed in the specified position (the pot housing cavity in the rice cooker body). For an example, refer to Japanese Patent Laid-Open Publication Hei 2-95315. Fig...

Claims

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Application Information

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IPC IPC(8): A47J27/00
Inventor 武智充佐藤慎一两角英树高椋诚一
Owner PANASONIC CORP
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